WO2017015362A4 - Creating spectral wells for inserting watermarks in audio signals - Google Patents

Creating spectral wells for inserting watermarks in audio signals Download PDF

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Publication number
WO2017015362A4
WO2017015362A4 PCT/US2016/043123 US2016043123W WO2017015362A4 WO 2017015362 A4 WO2017015362 A4 WO 2017015362A4 US 2016043123 W US2016043123 W US 2016043123W WO 2017015362 A4 WO2017015362 A4 WO 2017015362A4
Authority
WO
WIPO (PCT)
Prior art keywords
amplitude
audio signal
watermark
signal
frequency
Prior art date
Application number
PCT/US2016/043123
Other languages
French (fr)
Other versions
WO2017015362A1 (en
Inventor
Barry Blesser
Original Assignee
Tls Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tls Corp. filed Critical Tls Corp.
Priority to EP16828468.5A priority Critical patent/EP3326079A4/en
Priority to CA2993192A priority patent/CA2993192C/en
Publication of WO2017015362A1 publication Critical patent/WO2017015362A1/en
Publication of WO2017015362A4 publication Critical patent/WO2017015362A4/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/018—Audio watermarking, i.e. embedding inaudible data in the audio signal
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/16—Sound input; Sound output
    • G06F3/165—Management of the audio stream, e.g. setting of volume, audio stream path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2201/00—General purpose image data processing
    • G06T2201/005—Image watermarking
    • G06T2201/0052—Embedding of the watermark in the frequency domain
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
    • H04L2209/608—Watermarking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/835—Generation of protective data, e.g. certificates
    • H04N21/8358—Generation of protective data, e.g. certificates involving watermark

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Computational Linguistics (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Editing Of Facsimile Originals (AREA)

Abstract

A method for a machine or group of machines to watermark an audio signal may include receiving the audio signal, receiving a watermark signal, creating a spectral well on the audio signal by removing a portion of the audio signal corresponding to a frequency range, and inserting the watermark signal in the spectral well.

Claims

AMENDED CLAIMS
received by the International Bureau on 03 February 2017 (03.02.2017) . A method for a machine or group of machines to watermark an audio signal, the method comprising:
receiving the audio signal;
receiving a watermark signal including symbols to be inserted in predetermined frequency channels, each of the predetermined frequency channels corresponding to a different frequency range of the audio signal;
determining a ratio of (a) amplitude of a symbol to be inserted in one of the predetermined frequency channels to (b) amplitude of the audio signal corresponding to the one of the predetermined frequency channels;
when the ratio is below a threshold, creating a spectral well on the audio signal by removing a portion of the audio signal corresponding to the one of the predetermined frequency channels; and
inserting the symbols in respective ones of the predetermined frequency channels including a predetermined frequency channel in which a spectral well was created and a predetermined frequency channel in which a spectral well was not created.
2. (Cancelled)
3. The method of claim , wherein the creating the one or more spectral wells on the audio signal includes:
implementing a band-stop filter with a center frequency in a frequency range of the respective frequency channel; and
passing the audio signal through the band-stop filter.
4. The method of claim 1 , comprising:
prior to creating a spectral well, determining amplitude of the audio signal at a frequency range of a frequency channel at which the spectral well is to be created; and amplifying or attenuating a symbol to be inserted in the frequency channel such that amplitude of the symbol, once inserted in the frequency channel, approximates the amplitude of the audio signal at the frequency range at which the spectral well was created.
5. The method of claim 1 , comprising:
prior to creating a spectral well, determining a time range of the audio signal at which a symbol is to be inserted during the inserting, and
creating the spectral well by removing a portion of the audio signal corresponding to the determined time range.
6. The method of claim 1 , wherein the inserting the symbols includes:
modulating of the watermark signal with a carrier frequency in a frequency range of a frequency channel to obtain a modulated watermark signal; and
superimposing the modulated watermark signal onto the audio signal.
7. The method of claim 1 , wherein the inserting the symbols includes at least one of:
a) modulating of the watermark signal with a carrier frequency in a frequency range of a frequency channel in which a symbol is to be inserted to obtain a modulated watermark signal and modify amplitude of the modulated watermark signal such that the amplitude of the modulated watermark signal approximates amplitude of a portion of the audio signal removed to create a spectral well in the frequency channel to obtain a modified-amplitude modulated watermark signal, or
b) modify amplitude of the watermark signal such that the amplitude of the watermark signal approximates amplitude of the portion of the audio signal removed to create the spectral well in the frequency channel to obtain a modified-amplitude watermark signal and modulating of the modified-amplitude watermark signal with a carrier frequency in the frequency range of the frequency channel in which the symbol is to be inserted to obtain the modified-amplitude modulated watermark signal; and after creating the spectral well, superimposing the modified-amplitude modulated watermark signal on the audio signal.
8. A machine or group of machines for watermarking an audio signal, comprising: an input configured to receive the audio signal and a watermark signal including symbols to be inserted in predetermined frequency channels, each of the predetermined frequency channels corresponding to a different frequency range of the audio signal ; a signal to noise controller configured to determine a ratio of (a) amplitude of a symbol to be inserted in one of the predetermined frequency channels to (b) amplitude of the audio signal corresponding to the one of the predetermined frequency channels; a spectral well creator circuit configured to when the ratio is below a threshold, create a spectral well on the audio signal by removing a portion of the audio signal corresponding to the one of the predetermined frequency channels; and
a watermark inserter circuit configured to insert the symbols in respective ones of the predetermined frequency channels including a predetermined frequency channel in which a spectral well was created and a predetermined frequency channel in which a spectral well was not created.
9. (Cancelled)
10. The machine or group of machines of claim 8, wherein the spectral well creator circuit includes a band-stop filter with a center frequency in a frequency range of the respective frequency channel and is configured to pass the audio signal through the band-stop filter.
1. The machine or group of machines of claim 8, comprising:
a signal to noise ratio controller configured to, prior to the spectral well creator creating a spectral well, determine amplitude of a portion of the audio signal
corresponding to a frequency range of a frequency channel at which the spectral well is to be created; and
a watermark modifier configured to amplify or attenuate a symbol to be inserted in the frequency channel such that amplitude of the symbol, once inserted in the frequency channel, approximates the amplitude of the portion of the audio signal removed by the spectral well creator to create the spectral well.
12. The machine or group of machines of claim 8, comprising:
a watermark modulator configured to modulate the watermark signal with a carrier frequency in a frequency range of a frequency channel in which a symbol is to be inserted to obtain a modulated watermark signal,
wherein the watermark inserter is configured to insert the symbol in the spectral well by superimposing the modulated watermark signal onto the audio signal.
13. The machine or group of machines of claim 8, comprising:
a watermark modulator configured to at least one of:
modulate the watermark signal with a carrier frequency in a frequency range of a frequency channel in which a symbol is to be inserted to obtain a modulated watermark signal and modify amplitude of the modulated watermark signal such that the amplitude of the modulated watermark signal approximates amplitude of a portion of the audio signal removed to create a spectral well in the frequency channel to obtain a modified-amplitude modulated watermark signal, or
modify amplitude of the watermark signal such that the amplitude of the watermark signal approximates amplitude of the portion of the audio signal removed to create the spectral well in the frequency channel to obtain a modified-amplitude watermark signal and modulating of the modified-amplitude watermark signal with a carrier frequency in the frequency range of the frequency channel in which the symbol is to be inserted to obtain the modified-amplitude modulated watermark signal,
wherein the watermark inserter is configured to insert the symbol in the spectral
31 well by superimposing the modified-amplitude modulated watermark signal onto the audio signal.
14. The machine or group of machines of claim 8, comprising:
a watermark masker configured to, prior to the spectral well creator creating a spectral well, determining a time range of the audio signal at which a symbol is to be inserted,
wherein the spectral well creator circuit is configured to create the spectral well by removing a portion of the audio signal corresponding to the determined time range.
15. A machine or group of machines for inserting watermarking symbols in predetermined frequency channels of an audio signal, each of the frequency channels corresponding to a different frequency range of the audio signal, comprising:
an input configured to receive the audio signal;
a signal to noise controller configured to determine a ratio of (a) amplitude of a symbol to be inserted in one of the predetermined frequency channels to (b) amplitude of the audio signal corresponding to the one of the predetermined frequency channels; and
a spectral well creator circuit configured to when the ratio is below a threshold, create a spectral well on the audio signal by removing a portion of the audio signal corresponding to the one of the predetermined frequency channels in which the watermarking symbols are to be inserted.
16. (Cancelled)
17. The machine or group of machines of claim 15, wherein the spectral well creator circuit includes a band-stop filter with a center frequency in a frequency range of the respective frequency channel and is configured to pass the audio signal through the band-stop filter.
32
18. The machine or group of machines of claim 15, comprising:
a watermark modifier configured to amplify or attenuate amplitude of a symbol to be inserted in a frequency channel such that the amplitude of the symbol, once inserted in the frequency channel, approximates amplitude of a portion of the audio signal removed by the spectral well creator to create the spectral well.
19. The machine or group of machines of claim 15, comprising:
a watermark modifier configured to modulate the watermark signal with a carrier frequency in a frequency range of a frequency channel in which a symbol is to be inserted to obtain a modulated watermark signal; and
a watermark inserter configured to insert the symbol in the spectral well by superimposing the modulated watermark signal onto the audio signal.
20. The machine or group of machines of claim 5, comprising:
a watermark modifier configured to at least one of:
modulate the watermark signal with a carrier frequency in a frequency range of a frequency channel in which a symbol is to be inserted to obtain a modulated watermark signal and modify amplitude of the modulated watermark signal such that the amplitude of the modulated watermark signal approximates amplitude of a portion of the audio signal removed to create a spectral well in the frequency channel to obtain a modified-amplitude modulated watermark signal, or
modify amplitude of the watermark signal such that the amplitude of the watermark signal approximates amplitude of the portion of the audio signal removed to create the spectral well in the frequency channel to obtain a modified-amplitude watermark signal and modulating of the modified-amplitude watermark signal with a carrier frequency in the frequency range of the frequency channel in which the symbol is to be inserted to obtain the modified-amplitude modulated watermark signal; and
a watermark inserter configured to insert the symbol in the spectral well by
33 superimposing the modified-amplitude modulated watermark signal onto the audio signal.
34
PCT/US2016/043123 2015-07-20 2016-07-20 Creating spectral wells for inserting watermarks in audio signals WO2017015362A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16828468.5A EP3326079A4 (en) 2015-07-20 2016-07-20 Creating spectral wells for inserting watermarks in audio signals
CA2993192A CA2993192C (en) 2015-07-20 2016-07-20 Creating spectral wells for inserting watermarks in audio signals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/803,655 2015-07-20
US14/803,655 US9454343B1 (en) 2015-07-20 2015-07-20 Creating spectral wells for inserting watermarks in audio signals

Publications (2)

Publication Number Publication Date
WO2017015362A1 WO2017015362A1 (en) 2017-01-26
WO2017015362A4 true WO2017015362A4 (en) 2017-03-02

Family

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US (1) US9454343B1 (en)
EP (1) EP3326079A4 (en)
CA (1) CA2993192C (en)
WO (1) WO2017015362A1 (en)

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Also Published As

Publication number Publication date
CA2993192C (en) 2024-05-07
EP3326079A4 (en) 2019-03-20
EP3326079A1 (en) 2018-05-30
WO2017015362A1 (en) 2017-01-26
US9454343B1 (en) 2016-09-27
CA2993192A1 (en) 2017-01-26

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